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Finding the Fourth Proportional to 105,485.91, 145,570.74 and 57,742.29

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Solution

The fourth proportional to 105,485.91, 145,570.74 and 57,742.29 is: 79,684.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,485.91 : 145,570.74 = 57,742.29 : x
  2. Step 2: Convert to fraction form
    105,485.91/145,570.74 = 57,742.29/x
  3. Step 3: Cross multiply
    105,485.91x = 145,570.74 × 57,742.29
  4. Step 4: Simplify right side
    105,485.91x = 8,405,587,884.59
  5. Step 5: Solve for x
    x = 8,405,587,884.59/105,485.91
  6. Step 6: Final answer
    x = 79,684.46

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